/* Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. */

#pragma once

#include <string>
#include <vector>

#ifdef _MSC_VER
#define PATH_SEP "\\"
#else
#define PATH_SEP "/"
#endif

namespace tokenizers {
namespace utils {

inline std::string PathJoin(const std::vector<std::string>& paths,
                            const std::string& sep = PATH_SEP) {
  if (paths.size() == 1) {
    return paths[0];
  }
  std::string filepath = "";
  for (const auto& path : paths) {
    if (filepath == "") {
      filepath += path;
      continue;
    }
    if (path[0] == sep[0] || filepath.back() == sep[0]) {
      filepath += path;
    } else {
      filepath += sep + path;
    }
  }
  return filepath;
}

inline std::string PathJoin(const std::string& folder,
                            const std::string filename,
                            const std::string& sep = PATH_SEP) {
  return PathJoin({folder, filename}, sep);
}

}  // namespace utils
}  // namespace tokenizers
